Add a new internal enum for shader type, instead of re-using GL enums.

TRAC #22412

Signed-off-by: Nicolas Capens
Signed-off-by: Shannon Woods
Author: Jamie Madill

git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1783 736b8ea6-26fd-11df-bfd4-992fa37f6226
6 files changed